Combined Effect of Coherent Z Exchange and the Hyperfine Interaction in Atomic PNC

Published

October 12, 2021

Author(s)

W R. Johnson, M S. Safronova, U I. Safronova

Abstract

The nuclear spin-dependent parity nonconserving (PNC) interaction arising from a combination of the hyperfine interaction and the coherent, spin-independent, PNC interaction from Z exchange is evaluated using many-body perturbation theory. For the 6s^1/2^-68_1/2 transition in ¹³³Cs, we obtain a result that is about 40% smaller than that found previously by Bouchiat and Piketty [Phys. Lett. B 269, 195 (1991)]. Applying this result to ¹³³Cs, leads to an increase in the experimental value of nuclear anapole moment and exacerbates differences between constratints on PNC menson coupling constants obtained from the Cs anapole moment and those obtained from other nuclear parity violating experiments. Nuclear spin-dependent PNC dipole matrix elements, including contributions from the combined weak-hyperfine interaction, are also given for the 78_1/2-88_1/2 transition in ²¹¹Fr and for transitions between ground-state hyperfine levels in K, Rb, Cs, Ba⁺, Au, Tl, Fr, and Ra⁺.

Citation

Physical Review A (Atomic, Molecular and Optical Physics)

Pub Type

Journals

Keywords

anapole moment, hyperfine, parity nonconservation, perturbation theory, spin-dependent PNC effects, weak interactions

Citation

Johnson, W. , Safronova, M. and Safronova, U. (2021), Combined Effect of Coherent Z Exchange and the Hyperfine Interaction in Atomic PNC, Physical Review A (Atomic, Molecular and Optical Physics) (Accessed March 23, 2025)